(at around 32 mins) When Tyler Sims is shown pulling up to meet Emma Wagner at the park you see a man in a brown jacket and jeans just beginning to walk his German Shepherd dog into the park and when the camera changes angle a second later to show Emma Wagner's face you see the same man in the distance walking out of the frame.
When Crews takes a picture of Dani with his cell phone the people who were behind her before and after the picture aren't in the picture on Crews cell phone.
When Crews and Reese are viewing the dead body, at the line "We should run a tox screen" the body does a shallow exhale / inhale.